Oxyacetylene welding and cutting torch



T. A. ERRETT OXYACETYLENE WELDING AND CUTTING TORCH Filed Sept. ll, 19192 Sheets-Sheet 1 Oct. 23, i923.

T. A. ERRETT OXYACETYLENE WELDING AND CUTTING TORCH Filed Sept. 11, 19192 Sheets-Sheet 2 lwumdo/L Wlan/:1s H. ENRE Tr Patented Oct. 23, 1923.

, UNITED: sir...aflasl PATENT oFFlcE.

THOMAS A. EREETT, or SEATTLE, WASHINGTON, AssIeNoR, BY MESNEASSIGNMENTS, -I

T MODERN TORCH CO. INCmA CORPORATION OF WASHINGTON.

OXYACETYLENE WELDING AND CUTTING TORCH.

Application led September 11, 1919. Serial No. 323,137.

To all whom t may concern.'

Be it known that I, THOMAS A. ERRETT, a citizen of the United States,and resident of the city of Seattle, county of King, State ofWashington, have invented certain new and useful 1Improvements inOxyacetylene Welding and Cuttin Torches, of which-the following is aspecication.

This invention relates to new and useful l0 improvements inOxy-acetylene or Oxy-hydrogen cutting and welding torches, in

which oxygen and acetylene gases, or oxy-` gen and hydrogen gases areintimately mixed to form a circular pre-heating flame in the center,whereby the pre-heating Iiame will always be in advance of the cuttingjet regardless of the of the torch. l

This invention is in the nature of an improvement in Oxy-acetylenecutting and welding torches embodied in my' co-pending application ledAugust 7, 1918, Serial No.

248,817. The diflerentiations between the two constructions resideslargely in the kmeans whereby the gases may be more intimately vmixedduring their passage through the mixing chamber and the tip, therebypreventing back-firing resulting in the flame working back through thegas passages of the torch and causing the flame to break and damage thehead, and frequently causing dangerous explosions.

A further object resides in the construction of a chamber in which gasesare in' jected and intimately mixed before passing into the annularchamber embodied within the tip.

position or the movement A further object resides in the construc.

tion of the injection type of torch wherein leaka e ofhigh pressuregases into the mixing c amber of the low pressure gases is precluded. t

Aistill further object resides in the construction of this type of torchrendering the workable parts more easily machined and more accessible toquick disassembly without having to dismantle the torch in its entirety.f

One of the most essential and novel fea# 50, tures of'this improvementresides in the provision for expansion and contraction with.- in themixing chamber.

The inventlon consists of a novel arrangement, construction andcombination of parts as will be more fully describedin the followingspecification, illustrated in the drawligs and then particularly definedin the c aims.

In the drawings, Figure 1 is a side elevav tion of the device, Figure 2is a sectional elevation of the same, Figure 3 is a perspective ofl aninternal mixing device preferably for acetylene gases embodied withinthe tip, Figure 4 is a perspective view of a modified form ofconstruction, preferably employed for hydrogen gases, Fi re 5 is a planview taken along line A of Figure 2, Figure 6 is an elevation, partly insection, of an alternative form of construction, Figure 7 is a sectionalelevation of the same, B-B of Figure 7, and Figure 9 spective view of adetail thereof.

Referring more particularly to the drawings, wherein like referencenumerals indicate like parts, the numeral 1 represents the shank orhandle end of the casing wherein is embodied the passage ways for therespective pipes, through which separate gases are conveyed from theintake valve (not shown) insertible into the shank 1.

The torch, as shown, consists of an elongated cylindrically shapedmember' 2 that is cored out from its lower end and having isy aperformed therein a conically shaped seatncar the upper extremit andterminating with the cored-out portion slightly reduced in diameter.

A lateral ange 3 formed integral with the member 2 serves as theconnecting means for the respective ipes 4, 5 and 6, the ports of' whichare lsposed to register with apertures 9, 10 and' 11, of the flange thatcommunicates with the internal chamber of the' torch.-

Insertible within this chamber is an elongated sleeve 12 having atubular plug 13 extendin longitudinally therethrough with aconicall'yshaped head 14 upon its upper end that is normally in abutmentwith the conically shaped seat 7 of the internal chamber. This plug isprovidedwith an lorifice 15 through its center for the passage of highressure oxygen that enters its upper port iirom the chamber 8.v Thesleeve 12 is further providedf with a plurality of smaller apertures 16that extend longitudinally through the shell cir- 'zo Figure 8 is a planview taken on. line cumferentially the plug 13, and each of theseorifices are disposed to register with bypasses or apertures 17,respectively, that extend transversely through the shell vof the plugfor the reception of oxyhydrogen of Oxy-acetylene gases that enter froma chambel` 18 formed by the outer surface of the sleeve and the innerperipheral surface of the torch member 2. A collar 30 upon the upper endof the plug precludes the intermixture of the hydrogen or acetylenegases with the low pressure torch member 2' and hence precludes theescapement of gases around its outer edges.

Disposed in abutting contact with the lower end of the plug 12 areeither of the interchangeable tips 22 and 23, the selection of whichdepending upon whether acetylene or hydrogen gas is employed. In Figure3 the tip, as shown, is preferablelwhen acetylene gas is used. ltconsists of an elongated member with collars 24 and 25 upon its upperand lower ends, and with an orifice 15 through its center extendinglongitudinally thereof, and likewise the same number of small orifices16 that project through the upper and lower collars.

When the upper end of the tip is placed into alinement with the lowerend of the 'sleeve 12, and the plug 13 being forced upwardly until thehead thereof comes into abutment with the seat 7, the chambers 8 and 20,respectively, are formed thereby, and the port 15 registers with theport 15 of the tip. By a slight oflset'in the lower end of the sleeve 12a chamber 31 is established for the mixture of the Oxy-acetylene gases.y.

lin Figure 4 the tip is slightly modified in construct-ion for theapplication of hydrogen gas, the stem 33 being much shorterl and havinga fluted collar 34 provided on its lower end that tapers to a point.These tips are inserted selectively into taper shaped outer casings 26,the upper ends of which are caused to abut againt the lower face of thecollar 34.4 Beads 27 around their upper ends serve as a means forsecuring the tips 1n contact with the sleeve 12 which is effected bymeans of a union coupling 28 that engages said beads, and having itsupper end threaded to engage the lower shanked end 'of the torch.

llt can be observed that the heated gases within the chambers 18 and 31respectively wlllveause the sleeve 12 to become heated, and consequentlywill expand, the upper 'en d of which being free to move upwardly withinthe chamber 20 provided the space for such expansion and likewisecontraction, without aecting the valve seat of the plug 13, when theheated parts become cooled.

rlhe operation of the torch may be described as follows: y

By the pressure of the hand upon the valve 40 the passage of therespective gases through the pipes 4, 5 and 6 is controlled. Acety'leneor hydrogen gas is first introduced through the pipe 6 into the annularchamber 18 where it impinges against the walls thereof forming a vaporand passing outwardly through bypasses 17 into the small apertures 16that are provided circumferentially the sleeve 12 where such gas becomesintimately mixed with the low pressure oxygen introduced from the pipe 5into the annular chamber 20, thence into the aperture 16.

The mixed gases then enter the annular chamber 31 expanding therein andbecoming atomized and escape through orifice 16 into the last of theannular mixing chamf bers 41 formedin the tip. When acetylene isemployed this chamber is' of considerable length, as shown by theconstruction of the tip in Figure 3, therefore, providing forconsiderable expansion for the atomizing of the gases before such escapeinto a spray outwardly through the apertures 16 into the jet of highpressure oxygen that passes `from the pipe 4 into the chamber 8, and

thence outwardly through the port 15 at the lower end of the torch, thusforming a welding Haine out ofthe atomized mixture of the Oxy-acetylenegases.

1n Figure 6 is shown a modified form of construction particularlyadapted for cutting. The construction consists of an elongated torchmember 40 with a tube 41 extending therethrough that registers at itstop with the port of a passage 42 that delivers the high pressure oxygenfrom the upper end of the torch' member 40. tllhe passage 53 surroundingthe tube 41 registers with the port of the passage 43, through whichOxy-acetylene gases are delivered.

Upon the lower end of the torch member 40 is attached a plug 44 that hasa central passage. 45 that extends lengthwise thereof. rllhe lowerend ofthe plug being of increased diameter through which a series of passages46 are provided thatI communicate with the central passage 45. 'llhelower construction of this torch member 40 is such that when the plug 44is screwed up tightly the combustion chamber 47 is formed between theouter periphery of the plug and the inner wall of the union connection48 of the torch member 40. rllhi's combustion chamber serves to atomizethe gases. 'llhe mixture thence passes. through orifices 49, into thecentral passage 45 from whence such gases are discharged into expansionchambers 50, and are thence expelled MND llO

through the central passage 52 of the tip into the atmosphere at the endthereof, thereby forming an intensified cutting jet.

What I claim to be new and desire to protect by Letters Patent is:

l. A welding and cutting torch in combination comprising a head coredout from its lower extremity for the reception of gases, a plugthereinprovided with a passage throughits center extending lengthwisethereof adapted to register'l with a mixing chamber formed thereby-wit-hin the upper end of said head, a telescopically disposed sleevearound said plug provided with a plurality of passages extendingthroughout its length, each of said passages communicating with ftransverse passages -through its outer periphery, said sleeve adapted toform independent mixing chambers for low pressure and acetylene gasesthat register respectively with the transversev and longitudinalpassages of said sleeve, a tip, a plug within said tip having a passageextending longitudinally froml end to end and a plurality oflongitudinal passages in registry with an intermediate chamber aroundits outer periphery, and

tip for the discharge thereof, a plug for said head; said plug having amovably disposed sleeve to form a mixing chamber for the gases and toprovide for expansion and contraction thereof, due to varyingtemperatures of said head, and means for .maintaining said tip, sleeveand plunger in functional position.

Signed at Seattle, Washington, this 19 day of Aug., 1919.

THOMAS A. ERRETT.

